El-Khiyami Sh S, Ali Heba, Ismail A M, Hafez R S
Physics Department, Faculty of Science, Cairo University, Cairo, 12613, Egypt.
Physical Chemistry Department, National Research Centre, 33 El Bohouth Street, Dokki, Giza, 12622, Egypt.
Sci Rep. 2025 Jun 20;15(1):20124. doi: 10.1038/s41598-025-04429-y.
In this study, polypyrrole/carbon black (PPy/C) filler with different amounts (5, 10, 15, and 20 wt%) was immobilized in a polymer blend consisting of chitosan/polyethylene glycol (CS/PEG) to produce conductive and dye adsorbent films. The study employed various distinctive techniques, including X-ray diffraction, Fourier transform infrared, and high-resolution scanning electron microscope, indicating that composites have high complexity and good interaction. Through the implementation of the UV-Vis technique, it has been observed that the reflectance of composites experiences enhancement with an increase in PPy/C content. The discussion covers the optical constants, such as the composites' refractive index and optical conductivity. Notably, the uniform dispersion of PPy/C has caused a significant rise in the electrical conductivity of the pristine blend from 1.182 × 10 (Ω.cm) to 1.42 × 10 (Ω.cm) when 15% PPy/C was added. This increased conductivity is attributable to correlated barrier-hopping mechanisms. The effects of increasing PPy/C quantity, contact time (0-260 min), initial MO dye concentration (20-120 mg/L), adsorbent film dosage (0.1, 0.25, 0.5, 0.75, and 1 g/L), and the initial pH (4-10) were examined. Incorporating PPy/C up to 10% improved the removal effectiveness of the composite film. The 10% PPy/C film exhibited the maximum removal effectiveness relative to other films. Langmuir showed better conventionality than the Freundlich isotherm model with R of 0.999. The maximal adsorption capacity observed in monolayer adsorption was determined to be 217 mg/g. The adsorption of MO by the 10% PPy/C film is a chemisorption process, according to the parameters of the kinetic studies. (CS/PEG)- (PPy/C) films could be assigned to the synergistic dye adsorption effect of PPy/C filler and CS/PEG polymer-making material, ensuring excellent adsorption efficiency. Because of these appealing characteristics, PPy/C has the potential to be an environmentally friendly adsorbent in the treatment of dye wastewater.
在本研究中,将不同含量(5%、10%、15%和20%重量)的聚吡咯/炭黑(PPy/C)填料固定在由壳聚糖/聚乙二醇(CS/PEG)组成的聚合物共混物中,以制备导电和染料吸附膜。该研究采用了各种独特的技术,包括X射线衍射、傅里叶变换红外光谱和高分辨率扫描电子显微镜,表明复合材料具有高度复杂性和良好的相互作用。通过紫外可见技术的应用,观察到复合材料的反射率随着PPy/C含量的增加而增强。讨论涵盖了光学常数,如复合材料的折射率和光导率。值得注意的是,当添加15%的PPy/C时,PPy/C的均匀分散使原始共混物的电导率从1.182×10(Ω·cm)显著提高到1.42×10(Ω·cm)。这种电导率的增加归因于相关的势垒跳跃机制。研究了增加PPy/C含量、接触时间(0 - 260分钟)、初始甲基橙(MO)染料浓度(20 - 120毫克/升)、吸附膜用量(0.1、0.25、0.5、0.75和1克/升)以及初始pH值(4 - 10)的影响。加入高达10%的PPy/C可提高复合膜的去除效果。相对于其他膜,10% PPy/C膜表现出最大的去除效果。朗缪尔等温线模型比弗伦德里希等温线模型具有更好的拟合度,相关系数R为0.999。单层吸附中观察到的最大吸附容量确定为217毫克/克。根据动力学研究参数,10% PPy/C膜对MO的吸附是一个化学吸附过程。(CS/PEG)-(PPy/C)膜可归因于PPy/C填料和CS/PEG聚合物材料的协同染料吸附作用,确保了优异的吸附效率。由于这些吸引人的特性,PPy/C有潜力成为处理染料废水的环保吸附剂。
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